An example implementation of CurrencyStoreType in github.com/trsathya/cryptex

CurrencyStore.swift

import Foundation
import Cryptex

struct CurrencyStore: CurrencyStoreType {
    static let shared: CurrencyStore = {
        return CurrencyStore(currencies: CurrencyStore.currencies)
    }()
    
    let currencies: [Currency]
    
    private init(currencies: [Currency]) {
        self.currencies = currencies
    }
    
    func isKnown(code: String) -> Bool {
        return currencies.filter { $0.code.lowercased() == code.lowercased() }.count > 0
    }
    
    func forCode(_ code: String) -> Currency {
        if let currency = (currencies.filter { $0.code.lowercased() == code.lowercased() }).first {
            return currency
        } else {
            return Currency(name: code, code: code)
        }
    }
    
    static let bitcoinCash =    Currency(name: "Bitcoin Cash", code: "BCH")
    static let binanceBitcoinCash =    Currency(name: "Bitcoin Cash", code: "BCC")
    static let bitcoinGold =    Currency(name: "Bitcoin Gold", code: "BTG")
    static let zcash =          Currency(name: "ZCash", code: "ZEC")
    static let ethereumClassic = Currency(name: "Ethereum Classic", code: "ETC")
    static let stellar =        Currency(name: "Stellar", code: "STR")
    static let dash =           Currency(name: "Dash", code: "DASH")
    static let nxt =            Currency(name: "NXT", code: "NXT")
    static let monero =         Currency(name: "Monero", code: "XMR")
    static let augur =          Currency(name: "Augur", code: "REP")
    
    static let bytecoin =       Currency(name: "Bytecoin", code: "BCN")
    static let bitcoinDark =    Currency(name: "BitcoinDark", code: "BTCD")
    static let mainSafeCoin =   Currency(name: "MainSafeCoin", code: "MAID")
    static let blackCoin =      Currency(name: "BlackCoin", code: "BLK")
    
    static let golem =          Currency(name: "Golem", code: "GNT")
    static let lisk =           Currency(name: "Lisk", code: "LSK")
    static let gnosis =         Currency(name: "Gnosis", code: "GNO")
    static let steem =          Currency(name: "STEEM", code: "STEEM")
    
    static let siacoin =        Currency(name: "Siacoin", code: "SC")
    static let digiByte =       Currency(name: "DigiByte", code: "DGB")
    static let bitShares =      Currency(name: "BitShares", code: "BTS")
    static let stratis =        Currency(name: "Stratis", code: "STRAT")
    static let factom =         Currency(name: "Factom", code: "FCT")
    static let syscoin =        Currency(name: "Syscoin", code: "SYS")
    static let dogecoin =       Currency(name: "Dogecoin", code: "DOGE")
    static let gameCredits =    Currency(name: "GameCredits", code: "GAME")
    static let lbryCredits =    Currency(name: "LBRY Credits", code: "LBC")
    static let decred =         Currency(name: "Decred", code: "DCR")
    static let neoscoin =       Currency(name: "Neoscoin", code: "NEOS")
    static let viacoin =        Currency(name: "Viacoin", code: "VIA")
    static let omni =           Currency(name: "Omni", code: "OMNI")
    static let synereoAMP =     Currency(name: "Synereo AMP", code: "AMP")
    static let vertcoin =       Currency(name: "Vertcoin", code: "VTC")
    static let counterparty =   Currency(name: "Counterparty", code: "XCP")
    static let clams =          Currency(name: "CLAMS", code: "CLAM")
    static let pascalCoin =     Currency(name: "PascalCoin", code: "PASC")
    static let gridcoinResearch = Currency(name: "GridCoin Research", code: "GRC")
    static let storjcoinX =     Currency(name: "Storjcoin X", code: "SJCX")
    static let potCoin =        Currency(name: "PotCoin", code: "POT")
    static let burst =          Currency(name: "Burst", code: "BURST")
    static let huntercoin =     Currency(name: "Huntercoin", code: "HUC")
    static let bitmark =        Currency(name: "Bitmark", code: "BTM")
    static let bitCrystals =    Currency(name: "BitCrystals", code: "BCY")
    static let primecoin =      Currency(name: "Primecoin", code: "XPM")
    static let belacoin =       Currency(name: "Belacoin", code: "BELA")
    static let peercoin =       Currency(name: "Peercoin", code: "PPC")
    static let einsteinium =    Currency(name: "Einsteinium", code: "EMC2")
    static let expanse =        Currency(name: "Expanse", code: "EXP")
    
    static let dnotes =         Currency(name: "DNotes", code: "NOTE")
    static let radium =         Currency(name: "Radium", code: "RADS")
    static let veriCoin =       Currency(name: "VeriCoin", code: "VRC")
    static let navCoin =        Currency(name: "NAVCoin", code: "NAV")
    static let florincoin =     Currency(name: "Florincoin", code: "FLO")
    static let pinkcoin =       Currency(name: "Pinkcoin", code: "PINK")
    static let namecoin =       Currency(name: "Namecoin", code: "NMC")
    static let nautiluscoin =   Currency(name: "Nautiluscoin", code: "NAUT")
    static let foldingCoin =    Currency(name: "FoldingCoin", code: "FLDC")
    static let nexium =         Currency(name: "Nexium", code: "NXC")
    static let vcash =          Currency(name: "Vcash", code: "XVC")
    static let riecoin =        Currency(name: "Riecoin", code: "RIC")
    static let bitcoinPlus =    Currency(name: "BitcoinPlus", code: "XBC")
    static let steemDollars =   Currency(name: "Steem Dollars", code: "SBD")
    
    static let digixDAO =   Currency(name: "DigixDAO", code: "DGD")
    static let neo =   Currency(name: "Neo", code: "NEO")
    static let zCoin =   Currency(name: "ZCoin", code: "XZC")
    static let qtum =   Currency(name: "Qtum", code: "QTUM")
    static let gas =   Currency(name: "Gas", code: "GAS")
    static let populous =   Currency(name: "Populous", code: "PPT")
    static let binanceCoin =   Currency(name: "Binance Coin", code: "BNB")
    static let bitcoinDiamond =   Currency(name: "Bitcoin Diamond", code: "BCD")
    
    static var currencies: [Currency] = {
        var array = [
            bitcoinCash,
            binanceBitcoinCash,
            bitcoinGold,
            zcash,
            ethereumClassic,
            stellar,
            dash,
            nxt,
            monero,
            augur,
            bytecoin,
            bitcoinDark,
            mainSafeCoin,
            blackCoin,
            golem,
            lisk,
            gnosis,
            steem,
            siacoin,
            digiByte,
            bitShares,
            stratis,
            factom,
            syscoin,
            dogecoin,
            gameCredits,
            lbryCredits,
            decred,
            neoscoin,
            viacoin,
            omni,
            synereoAMP,
            vertcoin,
            counterparty,
            clams,
            pascalCoin,
            gridcoinResearch,
            storjcoinX,
            potCoin,
            burst,
            huntercoin,
            bitmark,
            bitCrystals,
            primecoin,
            belacoin,
            peercoin,
            einsteinium,
            expanse,
            dnotes,
            radium,
            veriCoin,
            navCoin,
            florincoin,
            pinkcoin,
            namecoin,
            nautiluscoin,
            foldingCoin,
            nexium,
            vcash,
            riecoin,
            bitcoinPlus,
            steemDollars,
            digixDAO,
            neo,
            zCoin,
            qtum,
            gas,
            populous,
            binanceCoin,
            bitcoinDiamond
        ]
        array.append(contentsOf: Currency.currencies)
        return array
    }()
}